Chemistry
A metal which produces hydrogen on reacting with alkali as well as with acid:
- Iron
- Magnesium
- Zinc
- Copper
Analytical Chemistry
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Answer
Zinc
Reason — Reactions of Zinc with alkali and acid are shown below:
Zn + 2NaOH ⟶ Na2(ZnO)2 + H2↑
Zn + HCl ⟶ ZnCl2 + H2↑
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The colour of an aqueous solution of copper sulphate is:
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Which of the following is the best reagent to distinguish lead nitrate and zinc nitrate ?
P NaOH solution
Q KOH solution
R NH4OH solution
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Both P and Q